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APPLICATIONS

DOUT1

DOUT2

DOUT3

RIN1

RIN2

DOUT4

RIN3

N.C.

C1–

DIN1

DIN2

DIN3

ROUT1

ROUT2

DIN4

ROUT3

1

2

3

4

5

6

7

8

9

10

11

12

13

14

28

27

26

25

24

23

22

21

20

19

18

17

16

15

C2 +

GND

C2-

V-

DOUT1

DOUT2

DOUT3

RIN1

RIN2

DOUT4

RIN3

DOUT5

FORCEON

FORCEOFF

C1+

V+

C1-

DIN1

DIN2

DIN3

ROUT1

ROUT2

DIN4

ROUT3

DIN5

ROUT1B

INVALID

DB, DW, OR PW PACKAGE

(TOP VIEW)

RHB PACKAGE

(TOP VIEW)

1

2

3

4

5

6

7

8

24

23

22

21

20

19

18

17

31

32

30 29 28 27 26 25

10

9

11 12 13 14 15 16

N.C. - Not inter nally connected

DESCRIPTION/ORDERING INFORMATION

TRS3238E

3-V TO 5.5-V MULTICHANNEL RS-232 LINE DRIVER/RECEIVER

WITH

±15-kV ESD (HBM) PROTECTION

SLLS797 – JUNE 2007

• RS-232 Bus-Pin ESD Protection Exceeds

±15 kV Using Human-Body Model (HBM)

• Meets or Exceeds the Requirements of

TIA/EIA-232-F and ITU v.28 Standards

• Operates With 3-V to 5.5-V V

• Operates up to 400 kbit/s

• Five Drivers and Three Receivers

• Auto-Powerdown Plus Feature Enables

Flexible Power-Down Mode

• Low Standby Current . . . 1 μA Typical

• External Capacitors . . . 4 × 0.1 μF

• Accepts 5-V Logic Input With 3.3-V Supply

• Always-Active Noninverting Receiver Output

(ROUT1B)

• Alternative High-Speed Pin-Compatible Device

(1 Mbit/s) for TRSF3238

• ESD Protection for RS-232 Interface Pins

–

±15 kV – Human-Body Model (HBM)

–

±8 kV – IEC61000-4-2, Contact Discharge

–

±15 kV – IEC61000-4-2, Air-Gap Discharge

• Battery-Powered Systems

• PDAs

• Notebooks

• Subnotebooks

• Laptops

• Palmtop PCs

• Hand-Held Equipment

• Modems

• Printers

The TRS3238E consists of five line drivers, three line receivers, and a dual charge-pump circuit with

±15-kV

ESD (HBM) protection on the driver output (DOUT) and receiver input (RIN) terminals. The device meets the

requirements of TIA/EIA-232-F and provides the electrical interface between notebook and subnotebook

computer applications. The charge pump and four small external capacitors allow operation from a single 3-V to

5.5-V supply. In addition, the device includes an always-active noninverting output (ROUT1B), which allows

applications using the ring indicator to transmit data while the device is powered down. This device operates at

data signaling rates up to 250 kbit/s and a maximum of 30-V/

μs driver output slew rate.

Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas

Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.

UNLESS

OTHERWISE

NOTED

this

document

contains

Copyright © 2007, Texas Instruments Incorporated

PRODUCTION DATA information current as of publication date.

Products conform to specifications per the terms of Texas

Instruments standard warranty. Production processing does not

necessarily include testing of all parameters.